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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-11-24 17:16:30 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-11-24 17:16:30 +1100 |
| commit | 1e43bee9c70654b4d52472c19e5f0a0cc18b6b36 (patch) | |
| tree | ff601ec0c0d14125d0324f21b3c7e6d5e19fa252 /drivers/usb/host/ohci-pci.c | |
| parent | 7d6709a20866a885916214590b7c394a21be9e25 (diff) | |
| parent | a8a8a669ea13d792296737505adc43ccacf3a648 (diff) | |
Merge commit 'origin/master' into next
Diffstat (limited to 'drivers/usb/host/ohci-pci.c')
| -rw-r--r-- | drivers/usb/host/ohci-pci.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c index d2ba04dd785..b8a1148f248 100644 --- a/drivers/usb/host/ohci-pci.c +++ b/drivers/usb/host/ohci-pci.c @@ -177,6 +177,13 @@ static int ohci_quirk_amd700(struct usb_hcd *hcd) return 0; pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev); + + /* SB800 needs pre-fetch fix */ + if ((rev >= 0x40) && (rev <= 0x4f)) { + ohci->flags |= OHCI_QUIRK_AMD_PREFETCH; + ohci_dbg(ohci, "enabled AMD prefetch quirk\n"); + } + if ((rev > 0x3b) || (rev < 0x30)) { pci_dev_put(amd_smbus_dev); amd_smbus_dev = NULL; @@ -262,6 +269,19 @@ static void amd_iso_dev_put(void) } +static void sb800_prefetch(struct ohci_hcd *ohci, int on) +{ + struct pci_dev *pdev; + u16 misc; + + pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller); + pci_read_config_word(pdev, 0x50, &misc); + if (on == 0) + pci_write_config_word(pdev, 0x50, misc & 0xfcff); + else + pci_write_config_word(pdev, 0x50, misc | 0x0300); +} + /* List of quirks for OHCI */ static const struct pci_device_id ohci_pci_quirks[] = { { |